teach_flow = 
	[
	 {
		 tip:"点击洒水壶，向泥土坡面洒水，并观察",
		 tag:[TAG_KETTLE,
		      TAG_KETTLE1
		      ],action:ACTION_DO1
	 },
	 {
		 tip:"点击洒水壶，向植被坡面洒水，并观察",
		 tag:[TAG_KETTLE,
		      TAG_KETTLE1
		      ],action:ACTION_DO2
	 },
	 {
		 tip:"分析实验结果",
		 tag:[TAG_LIB
		      ]
	 },
	 {
		 tip:"恭喜过关",
		 over:true
	 }
	 ]